DRA7xx USB Mass Storage can't find UDC

Hello Jim,

Could you follow the listed steps again?

Build kernel and usb gadget modules
1. Build the kernel default omap2plus_defconfig

2. make sure the dr_mode is set to "otg" for usb1/2 in platform specific .dtsi specific files.

dr_mode = "otg";
For dra7xx, set dr_mode to "otg" in arch/arm/boot/dts/dra7.dtsi and arch/arm/boot/dts/dra7-evm.dts files.
For omap5, set dr_mode to "otg" in arch/arm/boot/dts/omap5.dtsi file.
3. Build the kernel and usb gadgets as modules (for example g_zero.ko , g_mass_storage.ko etc).

5. create the sd card with file system and boot partition, refer to GLSDK software developers guide for more info.

6. copy arch/arm/boot/uImage and arch/arm/boot/dts/dra7-evm.dtb to /media/boot partition of sd card.

7. install the modules to sdcard rootfs mount directory.

#make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules_install INSTALL_MOD_PATH=/media/rootfs

Take a look on the links - e2e.ti.com/.../399501
processors.wiki.ti.com/.../Linux_Core_DWC3_User's_Guide
processors.wiki.ti.com/.../AM335x-PSP_04.06.00.08_Features_and_Performance_Guide

Best regards,
Yanko

Hi Yanko,

Thanks for your response,

i have tried with the document 

and your suggest  but also could not load the g_mass_storage driver

device log:

dra7xx-evm login: root
root@dra7xx-evm:~# dmesg | head | tail
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 3.14.43-dirty (anthony@anthony-VirtualBox) (gcc version 4.7.3 20130226 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #1 SMP PREEMPT Wed Aug 19 11:33:06 CST 2015
[ 0.000000] CPU: ARMv7 Processor [412fc0f2] revision 2 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[ 0.000000] Machine model: TI DRA742
[ 0.000000] Reserved memory: created CMA memory pool at 0x95800000, size 56 MiB
[ 0.000000] Reserved memory: initialized node ipu2_cma@95800000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created CMA memory pool at 0x99000000, size 64 MiB
[ 0.000000] Reserved memory: initialized node dsp1_cma@99000000, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created CMA memory pool at 0x9d000000, size 32 MiB
root@dra7xx-evm:~# dmesg | tail
[ 13.256535] (stk) : timed out waiting for ldisc to be un-installed
[ 13.363552] (stk) :ldisc_install = 1
[ 14.366533] (stk) :ldisc installation timeout
[ 14.369422] (stk) :ldisc_install = 0
[ 15.366534] (stk) : timed out waiting for ldisc to be un-installed
[ 15.478259] (stk) :ldisc_install = 1
[ 16.476532] (stk) :ldisc installation timeout
[ 16.479420] (stk) :ldisc_install = 0
[ 17.476531] (stk) : timed out waiting for ldisc to be un-installed
[ 17.483258] Bluetooth: st_register failed -22
root@dra7xx-evm:~# cd /lib/modules/3.14.43
3.14.43/ 3.14.43-dirty/
root@dra7xx-evm:~# cd /lib/modules/3.14.43
3.14.43/ 3.14.43-dirty/
root@dra7xx-evm:~# cd /lib/modules/3.14.43-dirty/
build modules.dep modules.pcimap
extra/ modules.dep.bin modules.seriomap
kernel/ modules.devname modules.softdep
modules.alias modules.ieee1394map modules.symbols
modules.alias.bin modules.inputmap modules.symbols.bin
modules.builtin modules.isapnpmap modules.usbmap
modules.builtin.bin modules.ofmap source
modules.ccwmap modules.order
root@dra7xx-evm:~# cd /lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget/
root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod function/usb_f_mass_storage.ko
root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod legacy/g
g_acm_ms.ko g_ether.ko g_midi.ko g_serial.ko
g_audio.ko g_ffs.ko g_multi.ko g_webcam.ko
g_cdc.ko g_hid.ko g_ncm.ko g_zero.ko
g_dbgp.ko g_mass_storage.ko g_printer.ko gadgetfs.ko
root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod legacy/g_
g_acm_ms.ko g_ether.ko g_midi.ko g_serial.ko
g_audio.ko g_ffs.ko g_multi.ko g_webcam.ko
g_cdc.ko g_hid.ko g_ncm.ko g_zero.ko
g_dbgp.ko g_mass_storage.ko g_printer.ko
root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod legacy/g_mass_storage.ko file=/dev/ram0 stall=0
insmod: ERROR: could not insert module legacy/g_mass_storage.ko: No such device
root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# dmesg | tail
[ 13.363552] (stk) :ldisc_install = 1
[ 14.366533] (stk) :ldisc installation timeout
[ 14.369422] (stk) :ldisc_install = 0
[ 15.366534] (stk) : timed out waiting for ldisc to be un-installed
[ 15.478259] (stk) :ldisc_install = 1
[ 16.476532] (stk) :ldisc installation timeout
[ 16.479420] (stk) :ldisc_install = 0
[ 17.476531] (stk) : timed out waiting for ldisc to be un-installed
[ 17.483258] Bluetooth: st_register failed -22
[ 150.448473] couldn't find an available UDC
root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget#

in other way i found the kconfg file 

ti-glsdk_dra7xx-evm_7_01_00_03/board-support/linux/drivers/usb/gadget/udc/Kconfig:

config USB_OMAP
tristate "OMAP USB Device Controller"
depends on ARCH_OMAP1
depends on ISP1301_OMAP || !(MACH_OMAP_H2 || MACH_OMAP_H3)
help
Many Texas Instruments OMAP processors have flexible full
speed USB device controllers, with support for up to 30
endpoints (plus endpoint zero). This driver supports the
controller in the OMAP 1611, and should work with controllers
in other OMAP processors too, given minor tweaks.

Say "y" to link the driver statically, or "m" to build a
dynamically linked module called "omap_udc" and force all
gadget drivers to also be dynamically linked.

the USB_OMAP is depends on OMAP1 is it right?

Hello Jim,

Try to apply the sequence in the pictures below:

root@dra7xx-evm:/lib/modules/3.14.31/kernel/drivers/usb/gadget# ls -la
drwxr-xr-x 2 root root 4096 Mar 1 18:25 .
drwxr-xr-x 10 root root 4096 Mar 1 18:08 ..
-rw-r--r-- 1 root root 12100 Mar 1 18:03 g_acm_ms.ko
-rw-r--r-- 1 root root 21956 Mar 1 18:03 g_audio.ko
-rw-r--r-- 1 root root 9672 Mar 1 18:03 g_cdc.ko
-rw-r--r-- 1 root root 6344 Mar 1 18:03 g_dbgp.ko
-rw-r--r-- 1 root root 11552 Mar 1 18:03 g_ether.ko
-rw-r--r-- 1 root root 14940 Mar 1 18:03 g_ffs.ko
-rw-r--r-- 1 root root 18300 Mar 1 18:03 g_hid.ko
-rw-r--r-- 1 root root 12192 Mar 1 18:03 g_mass_storage.ko
-rw-r--r-- 1 root root 19208 Mar 1 18:03 g_midi.ko
-rw-r--r-- 1 root root 15976 Mar 1 18:03 g_multi.ko
-rw-r--r-- 1 root root 8904 Mar 1 18:03 g_ncm.ko
-rw-r--r-- 1 root root 24236 Mar 1 18:03 g_printer.ko
-rw-r--r-- 1 root root 9376 Mar 1 18:03 g_serial.ko
-rw-r--r-- 1 root root 28880 Mar 1 18:03 g_webcam.ko
-rw-r--r-- 1 root root 13448 Mar 1 18:03 g_zero.ko
-rw-r--r-- 1 root root 27896 Mar 1 18:03 gadgetfs.ko
-rw-r--r-- 1 root root 61064 Mar 1 18:03 libcomposite.ko
-rw-r--r-- 1 root root 22328 Mar 1 18:03 u_ether.ko
-rw-r--r-- 1 root root 18204 Mar 1 18:03 u_serial.ko
-rw-r--r-- 1 root root 11644 Mar 1 18:03 usb_f_acm.ko
-rw-r--r-- 1 root root 15460 Mar 1 18:03 usb_f_ecm.ko
-rw-r--r-- 1 root root 11748 Mar 1 18:03 usb_f_ecm_subset.ko
-rw-r--r-- 1 root root 30096 Mar 1 18:03 usb_f_fs.ko
-rw-r--r-- 1 root root 59616 Mar 1 18:03 usb_f_mass_storage.ko
-rw-r--r-- 1 root root 21508 Mar 1 18:03 usb_f_ncm.ko
-rw-r--r-- 1 root root 9680 Mar 1 18:03 usb_f_obex.ko
-rw-r--r-- 1 root root 33732 Mar 1 18:03 usb_f_rndis.ko
-rw-r--r-- 1 root root 8132 Mar 1 18:03 usb_f_serial.ko
-rw-r--r-- 1 root root 21024 Mar 1 18:03 usb_f_ss_lb.ko
root@dra7xx-evm:/lib/modules/3.14.31/kernel/drivers/usb/gadget#

Try to insmod ./g_mass_storage.ko.

Best regards,

Yanko

HI Yanko,

thanks you quick reply

I have enable the OTG Support and Dual Role Mode from beginning. but it's seen not work.

# Miscellaneous USB options
#
CONFIG_USB_DEFAULT_PERSIST=y
CONFIG_USB_DYNAMIC_MINORS=y
CONFIG_USB_OTG=y
CONFIG_USB_OTG_WHITELIST=y
# CONFIG_USB_OTG_BLACKLIST_HUB is not set

# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
CONFIG_USB_MUSB_HDRC=y
# CONFIG_USB_MUSB_HOST is not set
# CONFIG_USB_MUSB_GADGET is not set
CONFIG_USB_MUSB_DUAL_ROLE=y

 

and i have a question that the building Linux kernel version is 3.14.43 from the GLSDK  by myself. but if is origin GLSDK 7_01_00_03 releases package the Linux kernel version is 3.14.31

 g_mass_storage.ko file are located in different path:

• Linux 3.14.43:
  /lib/modules/3.14.43/kernel/drivers/usb/gadget/legacy/g_mass_storage.ko
  
  
• Linux 3.14.31:
  /lib/modules/3.14.31/kernel/drivers/usb/gadget/g_mass_storage.ko

why are there have the different path?

Hello Jim,

According to the latest TRM version DRD is not supported.

24.7.4.4.3 OTG Control Software API
NOTE: The current implementation of the SuperSpeed USB DRD subsystem does not support OTG
2.0 protocols SRP and ADP. OTG 2.0 Host Negotiation Protocol (HNP) is supported.
NOTE: When controller is set to OTG mode, SuperSpeed (USB3.0) is not supported.

Refer to Global Control register USB_GCTL[13:12] PRTCAPDIR - Port Capability Direction
0x1: Core acts as DRD in host mode
0x3: Core acts as OTG DRD, with the mode set by the ID. IN THIS CASE SuperSpeed MODE IS NOT SUPPORTED.
0x2: Core acts as DRD in device mode

Therefore DRA7xx doesn't support DRD.

Best regards,
Yanko

Hi Yanko,

thank your answer, but where can find the TRM of DRA7xx document?

Best regards,
Jim

Hi Yanko,

I also want to know why DRA7xx USB DRD is not suppoted in the latest ?

thanks in advance

Best regards
Jim

Hello Jim,

Please contact your FAE, who must provide you DRA7xx Technical Reference Manual.

Best regards,

Yanko

Hi Yanko,

thanks i got the TRM document.

but i only use USB 2.0 not USB 3.0(SuperSpeed) so.. why are not support DRD ? Could you explain more detail ?

and according to the GLSDK_7.01.00.03_Data_Sheet is show support USB DRD mode.

Features Not Supported

• OTG support (HNP/SRP)

Features Supported

• USB Host mode.
• USB Peripheral mode
• USB DRD mode (Dual Role Device)

USB Configuration

For USB configuration selection please refer to USB General Guide Linux

Driver Features

The driver supports the following features

DRD (Dual Role Device) support

The DRD (Dual role device) support enable the each instance of controller to configure either as "Host" or "Device" mode. Refer to User's Guide for more details how to configure the controller into DRD mode.

 

and this is show USB Mass Storage can be work ? how to do it ?

Hi Yanko

in the DRA75x_74x_SR1.1_NDA_TRM_vZ

24.7.1 SuperSpeed USB DRD Subsystem Overview

SuperSpeed USB DRD Subsystem has four instances in the device providing the following functions:

• USB1: SuperSpeed (SS) USB 3.0 Dual-Role-Device (DRD) subsystem with integrated SS (USB3.0)

PHY and HS/FS (USB2.0) PHY

• USB2: High-Speed (HS) USB 2.0 Dual-Role-Device (DRD) subsystem with integrated HS/FS PHY

• USB3: HS USB 2.0 Dual-Role-Device (DRD) subsystem with ULPI (SDR) interface to external HS/FS

PHYs

• USB4: HS USB 2.0 Dual-Role-Device (DRD) subsystem with ULPI (SDR) interface to external HS/FS

PHYs.

is't mean SS USB 3.0 supports the DRD? and we also want to use DRD rather then OTG..

Hello Jim,

I have been investigated the issue with DRD.

See the listed points, which I discussed with GLSDK experts:

• The dra7xx USBIP does not support OTG, but it support DRD.
• The DRD is capability of controller to configure either in host mode or device mode.
• The OTG uses HNP/SNP protocol for switching role b/w host and device.

I have new suggestion about the issue with DRD enabling in GLSDK.

For device mode you have to set dr_mode to “peripheral” in arch/arm/boot/dts/dra7-evm*.dts file

For example: 

&usb1 {
dr_mode =  "peripheral" "otg";
};

&usb2 {
dr_mode = "host";
};

Then rebuild your Kernel and test on your board.

The GLSDK kernel (6.04.x onwards) supports DRD feature, Where USB ports has capable of switching between device mode or host mode dynamically based on the usb cable type connected.

If host-type (A-type) usb cable is connected, the port switched to host mode.

If device-type (B-type) usb cable is connected, the port switched to device mode.

Best regards,

Yanko

Hi Yanko,

Thanks for you advice.

i have edit the arch/arm/boot/dts/dra7-evm.dts file

and usb1 setting up to peripheral as below:

&usb1 {

       dr_mode = "peripheral";

};

and rebuild kernel wtih "make linux_clean", "make linux", "make linux_install" then copy kernel zImage and dra7*.dtb(device tree file), /lib/module/* into flash SD card

but on the target board the g_mass_storage.ko device drive also can not load UDC

the loading g_mass_storage.ko fail message

root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod legacy/g_mass_storage.ko

insmod: ERROR: could not insert module legacy/g_mass_storage.ko: No such device

and kernel message:

root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# dmesg | tail
[ 14.396573] (stk) :ldisc installation timeout
[ 14.399464] (stk) :ldisc_install = 0
[ 15.396575] (stk) : timed out waiting for ldisc to be un-installed
[ 15.508301] (stk) :ldisc_install = 1
[ 16.506572] (stk) :ldisc installation timeout
[ 16.509461] (stk) :ldisc_install = 0
[ 17.506571] (stk) : timed out waiting for ldisc to be un-installed
[ 17.513299] Bluetooth: st_register failed -22
[ 241.549485] couldn't find an available UDC
[ 616.511753] couldn't find an available UDC

 

so i check the source code ”linux/drivers/usb/gadget/udc/udc-core.c”  in the function usb_gadget_probe_driver() is show the couldn't find an available UDC

and than in the ”linux/drivers/usb/gadget/udc/omap_udc.c” function omap_udc_probe() should be register to UDC-core 

but i can't found the kernel option with OMAP UDC (Device Drivers->USB support->USB Gadget Support) 

is it a key point?

Hello Jim,

My last suggestion about your problem with UDC support.

You need to insert the dependent module from drivers/usb/gadget/function/usb_f_mass_storage.ko.

Then insert g_mass_storage.ko.
#insmod g_mass_stoarge.ko file=/dev/ram0 stall=0

Make sure previous inserted gadget modules are rmmod (incase of port is configured for DRD).

Best regards,
Yanko

Hello Jim,

Do you have any updates with your issue?

Best regards,
Yanko

Hi Yanko,

Yes, usb_f_mass_storage.ko. has inserted. But g_mass_storage.ko was still had UDC error , no matter I added " file=/dev/ram0 stall=0" or not.

Thanks.

Hello Jim,

Could you share complete console logs?

Do you use DRA7xx EVM or you have designed your own board?

Best regards,
Yanko

I use TI-J6 EVM board.

root@dra7xx-evm:~# dmesg |head [    0.000000] Booting Linux on physical CPU 0x0 [    0.000000] Linux version 3.14.43-dirty (anthony@anthony-VirtualBox) (gcc version 4.7.3 20130226 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #2 SMP PREEMPT Fri Aug 28 10:40:39 CST 2015 [    0.000000] CPU: ARMv7 Processor [412fc0f2] revision 2 (ARMv7), cr=10c5387d [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache [    0.000000] Machine model: TI DRA742 [    0.000000] Reserved memory: created CMA memory pool at 0x95800000, size 56 MiB [    0.000000] Reserved memory: initialized node ipu2_cma@95800000, compatible id shared-dma-pool [    0.000000] Reserved memory: created CMA memory pool at 0x99000000, size 64 MiB [    0.000000] Reserved memory: initialized node dsp1_cma@99000000, compatible id shared-dma-pool [    0.000000] Reserved memory: created CMA memory pool at 0x9d000000, size 32 MiB root@dra7xx-evm:~# root@dra7xx-evm:~# dmesg |tail [   14.276798] (stk) : timed out waiting for ldisc to be un-installed [   14.388524] (stk) :ldisc_install = 1 [   15.386797] (stk) :ldisc installation timeout [   15.389686] (stk) :ldisc_install = 0 [   16.386824] (stk) : timed out waiting for ldisc to be un-installed [   16.498607] (stk) :ldisc_install = 1 [   17.496800] (stk) :ldisc installation timeout [   17.499691] (stk) :ldisc_install = 0 [   18.496798] (stk) : timed out waiting for ldisc to be un-installed [   18.503527] Bluetooth: st_register failed -22 root@dra7xx-evm:~# root@dra7xx-evm:~# cd /lib/mod modprobe.d/ modules/ root@dra7xx-evm:~# cd /lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget/ root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod function/usb_f_mass_storage.ko root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod legacy/g_mass_storage.ko file=/dev/ram0 stall=0 insmod: ERROR: could not insert module legacy/g_mass_storage.ko: No such device

Here is the dmesg after insmod.

 

root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# insmod legacy/g_mass_storage.ko file=/dev/ram0 stall=0

root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget# dmesg |tai

l

[   15.389686] (stk) :ldisc_install = 0

[   16.386824] (stk) : timed out waiting for ldisc to be un-installed

[   16.498607] (stk) :ldisc_install = 1

[   17.496800] (stk) :ldisc installation timeout

[   17.499691] (stk) :ldisc_install = 0

[   18.496798] (stk) : timed out waiting for ldisc to be un-installed

[   18.503527] Bluetooth: st_register failed -22

[  421.669461] couldn't find an available UDC

[  883.771148] couldn't find an available UDC

[ 1038.261245] couldn't find an available UDC

root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget#

Hello Jim,

See some comments from SW team:

Can you check whether legacy/g_mass_storage.ko file exists?

Have tried with default GLSDK release image ?

Also make sure the USB port you are trying to load module, the dr_mode should be set to “otg”. Check arch/arm/boot/dts/dra7-evm.dts file.

Best regards,
Yanko

1.  g_mass_storage.ko is existed.

root@dra7xx-evm:/lib/modules/3.14.43-dirty/kernel/drivers/usb/gadget/legacy# ls -la g_mas*.*

-rw-r--r--    1 root     root        110600 Aug 28  2015 g_mass_storage.ko

2. It's no used. You can check 8/24,27 reply.

3. Did TI try this issue on EVM board? I think it's easy to reproduce.

 

Best Regards,

Jim Lin